Semirigid Homo- and Copoly(Imide-Carbonate)s Based on 3,4,3″,4″ -p-Terphenyltetracarboxdiimide

Abstract

Novel thermotropic liquid crystalline (LC) semirigid homo- and copoly(imidecarbonate)s composed of a 3, 4, 3″, 4″-p-terphenyltetracarboxdiimide ring and aliphatic chains were prepared by melt polycondensation of a dihexanol derivative of 3, 4, 3″, 4″-p-terphenyltetracarboxdiimide and/or a dioxydihexanol of biphenyl taken in a definite molar ratio with hexamethylene diphenyl dicarbonate in the presence of zinc acetate, and their thermal and mesogenic properties were evaluated. The assigned structures of polymers were characterized by FT-IR and ¹³C NMR spectroscopy, and elemental analyses. DSC and TG-DTA measurements, polarizing microscope observations of textures and temperature-dependent x-ray analyses demonstrated that the polymers have wider LC temperature ranges (nematic phase) than analogous semirigid poly(ester-imide)s and are thermally stable up to 300 °C in air.

Get full access to this article

View all access options for this article.

References

[1] Sato M , Hirata T and Mukaida K 1992 Makromol. Chem. 193 1729-1729

[2] Hirata T , Sato M and Mukaida K 1993 Makromol. Chem. 194 2861-2861

[3] Hirata T , Sato M and Mukaida K 1994 Macromol. Chem. Phys. 195 1611-1611

[4] Kricheldorf H R , Pakull R and Schwarz G 1993 Makromol. Chem. 194 1209-1209

[5] Hirata T , Sato M and Mukaida K 1994 Macromol. Chem. Phys. 195 2267-2267

[6] Sato M , Hirata T and Mukaida K 1995 Macromol. Rapid Commun. 15 203-203

[7] Sato M , Hirata T and Mukaida K 1996 Eur. Polym. J. 32 639-639

[8] Kricheldorf H R , Pakull R and Buchner S 1988 Macromolecules 21 1929-1929

[9] Sato M , Hirata T , Kamita T and Mukaida K 1995 High Perform. Polym. 7 347-347

10.

[10] Sato M , Hirata T and Ujiie S 1996 Macromol. Chem. Phys. 197 1983-1983

11.

[11] Sato M , Hirata T and Ujiie S 1996 React. Funct. Polym. 30 93-93

12.

[12] Abajo J , Campa J G , Kricheldorf H R and Schwarz G 1990 Makromol. Chem. 191 537-537

13.

[13] Abajo J , Campa J G , Kricheldorf H R and Schwarz G 1994 Polymer 35 5577-5577

14.

[14] Pardey R , Zheng A , Gabori P A , Harris F W , Cheng S Z D , Adduci J M , Facinelli J V and Lenz R W 1992 Macromolecules 25 5060-5060

15.

[15] Adduci J M , Facinelli J V and Lenz R W 1994 J. Polym. Sci., Part A: Polym. Chem. 32 2931-2931

16.

[16] Kricheldorf H R , Schwarz G , Berghan M , Abajo J and Campa J G 1994 Macromolecules 27 2540-2540

17.

[17] Kricheldorf H R and Berghan M 1995 J. Polym. Sci., Part A: Polym. Chem. 33 427-427

18.

[18] Kricheldorf H R , Linzer V , Abajo J and Campa J G 1995 J. Macromol. Sci.–Pure Appl. Chem. A 32 311-311

19.

[19] Sato M , Ujiie S and Hirata T 1996 Macromol. Chem. Phys. 197 2765-2765

20.

[20] Inoue T , Kakimoto M , Imai Y and Watanabe J 1995 Macromolecules 28 6368-6368

21.

[21] Inoue T , Kakimoto M , Imai Y and Watanabe J 1997 Macromol. Chem. Phys. 198 519-519

22.

[22] Sato M , Nakatsuchi K and Ohkatsu Y 1986 Makromol. Chem. Rapid Commun. 7 231-231

23.

[23] Sato M , Nakatsuchi K and Ohkatsu Y 1987 Makromol. Chem. Rapid Commun. 8 383-383

24.

[24] Sato M , Kurosawa K , Nakatsuchi K and Ohkatsu Y 1988 J. Polym. Sci., Part A: Polym. Chem. 26 3077-3077

25.

[25] Abe A and Furuya K 1986 Kobunshi Ronbunshu 43 247-247